Reference for Kelim 3:8
חָבִית שֶׁנִּקְּבָה וַעֲשָׂאָהּ בְּזֶפֶת יָתֵר מִצָּרְכָּהּ, הַנּוֹגֵעַ בְּצָרְכָּהּ, טָמֵא. יָתֵר מִצָּרְכָּהּ, טָהוֹר. זֶפֶת שֶׁנָּטְפָה עַל הֶחָבִית, הַנּוֹגֵעַ בָּהּ, טָהוֹר. מַשְׁפֵּךְ שֶׁל עֵץ וְשֶׁל חֶרֶס שֶׁפְּקָקוֹ בְזֶפֶת, רַבִּי אֶלְעָזָר בֶּן עֲזַרְיָה מְטַמֵּא. רַבִּי עֲקִיבָא מְטַמֵּא בְשֶׁל עֵץ, וּמְטַהֵר בְּשֶׁל חֶרֶס. רַבִּי יוֹסֵי מְטַהֵר בִּשְׁנֵיהֶם:
A jar which was perforated and repaired with more pitch than needed, whatever touches the [pitch that is] necessary may become impure. [Whatever touches] the extra pitch remains pure. Pitch that drops on a jar, whatever touches it is pure. A funnel [made of] wood or of clay which is plugged with pitch, Rabbi Eliezer ben Azariah declares it subject to become impure. Rabbi Akiva declares it subject to become impure if it is of wood, but not if it is of clay. Rabbi Yose declares both of them pure.